Game control method, system, and non-transitory computer-readable recording medium

ABSTRACT

Players with a wide range of levels or attack strength can enjoy a time-limited group battle, and the participation rate can be expected to improve throughout the set time slot. A battle time managing unit refers to a timer and a memory resource to manage the time of a battle between groups. A battle condition extraction unit refers to the memory resource and checks whether to change a battle condition during the time of the battle. A target changing unit refers to the memory resource to set a target of change based on the battle condition. A battle condition changing unit changes the battle condition for the target of change that was selected by the target changing unit. Based on the changed battle condition, a battle rendering unit executes rendition processing for the game related to the battle.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No. 14/631,221, filed Feb. 25, 2015, entitled “GAME CONTROL METHOD, SYSTEM, AND NON-TRANSITORY COMPUTER-READABLE RECORDING MEDIUM,” which claims benefit of priority to Japanese Patent Application No. 2014-034003 filed Feb. 25, 2014, the entire contents of which are incorporated herein by reference.

FIELD

Exemplary embodiments of the present disclosure relate to a game control method, a system, and a non-transitory computer-readable recording medium for providing client devices with a battle game over a network.

BACKGROUND

In recent years, online game services provided to client devices by a server device over a communication network have grown popular, and many game titles have been released on multiple platforms. These games are available in a variety of types and categories. Among such games, social games that allow multiple players to participate in the same game are especially booming.

One type of social game that has been proposed is a game in which a group (i.e. a guild) is formed whose members are characters each controlled by a player. The group then battles monster characters or the like (for example, JP2013-244126). Besides a “guild”, such a group may be referred to as a “party”, “team”, “community”, or the like depending on the game.

Recently, games with a function to allow groups of players to battle each other have been proposed. This function is particularly referred to as “Guild vs Guild”, abbreviated as “GvG”. In GvG, a predetermined time slot within a day is set, such as one hour from 20:00 to 21:00 (a shorter time slot being 30 minutes, and a longer time slot being two hours). The assembled groups then battle during this time slot (e.g. a “guild battle”). In some games, a plurality of time slots is set for holding a group battle.

A group battle during a predetermined time slot (i.e. a time slot group battle) is, for example, held as follows. One way is for a player who has entry authority, such as the master who is the leader of the group or the junior master who is the sub-leader, to enter the battle by selecting a predetermined time slot from among a plurality of set battle time slots. The group can thus participate in the group battle. Another way is for all groups to be randomly combined in time slots set in advance (such as one battle in the afternoon and another in the evening), with battles proceeding in accordance with the arbitrary combinations.

There is also a variety of types of battles. Examples include determining victory based on the total number of times characters of the opponent group are defeated, determining victory based on whether all of the participating characters in the opponent group are eliminated, and determining victory based on the amount of points, with a large number of points being awarded for defeating the boss of the opponent group.

SUMMARY

In a time slot group battle, the participation rate of group members in the battle tends to increase in the last half of the time slot. One reason is that players intentionally concentrate their attacks near the end of the time slot. This strategy does not provide the opponent time to counterattack and allows for an effective attack by augmenting the attack strength through consecutive attacks by multiple players in a short period of time in the last half (i.e. a combo). Another reason is that subduing the boss in the last half earns a high number of points, whereas even if players actively participate in the battle and attack the enemy in the first half, they may easily suffer a reverse in the last half. Other reasons include how limits are often placed on the number of attacks in the group battle, the battle points provided at the start of the battle, and the like, so that if players actively participate in the first half, they may use up their battle points, i.e. run out of ammo, in the last half and be unable to attack.

The game provider, however, wants players to participate actively in the battle throughout the entire time set for the group battle and to enjoy the game during the entire set time.

Another issue is that groups include players ranging from experienced game players to beginners with a low level and attack strength who have just started the game. Time slot group battles, however, are often not divided up by level, as is a battle with a strong enemy (raid boss) that appears during a quest. Hence, a battle may be fought with opponents having vastly dissimilar attack strengths. In this case, beginners not experienced with the game cannot fully understand effective attacks, such as combos, or the “unwritten rules” of an experienced group such as the timing within the guild for attacks. Beginners may therefore be unsuccessful. As a result, beginners may end up passively participating in a group battle. Under these circumstances, is therefore preferable to provide a game that allows players with a wide range of levels to enjoy a time slot group battle without regard for level.

Embodiments of the present disclosure have been conceived in light of these circumstances and provides a game control method, a system, and a non-transitory computer-readable recording medium that allow a wide range of players to enjoy a group battle without regard for difference in level, degree of attack strength, or the like and that, in a group battle limited to a time slot, improve the participation rate throughout the set time slot.

A game control method according to an exemplary aspect of the present disclosure can include the steps of: (a) dividing a battle time into a plurality of time slots in a battle game between groups with a battle time managing unit stored in a memory, the battle time managing unit further comprising a timer, and members of a group being characters stored in the memory, each character controlled by a player via a client device sending requests to a server; (b) setting a battle condition of at least one of the time slots in the plurality of time slots with a battle condition changing unit in the memory to differ from a battle condition of a second time slot in the plurality of time slots based on data from a battle condition extraction unit in the memory and a target changing unit in the memory; and (c) conducting the battle game on the server by a battle rendering unit in the memory based on the battle condition whereby at least one of the time slots in the plurality of time slots is different from the second time slot in the plurality of time slots.

According to exemplary embodiments, a battle game played in a predetermined time slot is divided into a plurality of time slots, such as a first portion, middle portion, and last portion, and a battle condition is changed in at least one of the subdivided time slots. By dividing the time slot of the battle game into a plurality of time slots and setting the battle condition for each time slot, a battle game that has conventionally been played under certain rules can be changed during the set time. In particular, by setting a battle condition that is advantageous for a certain target and by changing the battle condition in the time slot for the first half, for example, in which the participation rate in the time slot battle game is not high, an increase in the participation rate of characters throughout the time slots can be expected. Furthermore, circumstances that allow beginners to enjoy the battle can be created by setting the battle conditions for example to increase the attack strength of low-level characters, which correspond to beginners, and to favor beginners in the first half in which the participation rate in the battle is not very high.

The exemplary embodiments can provide a game control method, a system, and a non-transitory computer-readable recording and/or storage medium that allow a wide range of players to enjoy a group battle without regard for difference in level, degree of attack strength, or the like and that improve the participation rate in a group battle throughout the set time slot.

BRIEF DESCRIPTION OF DRAWINGS

Exemplary embodiments of the present disclosure will be further described below with reference to the accompanying drawings, wherein:

FIG. 1 illustrates the network structure of a game system according to the present embodiment;

FIG. 2 is a block diagram illustrating the structure of a server device according to the present embodiment;

FIG. 3 is a block diagram illustrating the structure of a client device according to the present embodiment;

FIG. 4 illustrates an example of a game screen according to the present embodiment;

FIG. 5 is a functional block diagram illustrating the structure of battle processing according to the present embodiment;

FIG. 6 is a conceptual diagram illustrating time management of a group battle according to the present embodiment;

FIGS. 7(a) and 7(b) are conceptual diagrams illustrating examples of battle conditions and targets of change in a group battle according to the present embodiment; and

FIG. 8 is a flowchart illustrating battle processing according to the present embodiment.

DETAILED DESCRIPTION

The following describes an exemplary embodiment of the present disclosure (the present embodiment) with reference to the drawings.

FIG. 1 illustrates the network structure of a game system 100 according to the exemplary embodiment. The game system 100 includes a server device 10 that provides a battle game service to a plurality of client devices 30 over a network 20. The server device 10 is a network node having a function to provide the battle game service and is, for example, configured using a host computer with high computing power. The server device 10 is not, however, limited to this example and may be configured using a general-purpose communication terminal device. The client device 30 is a network node having a function to receive provision of the battle game service and is, for example, configured using a general-purpose communication terminal device. In the present disclosure, the network node that provides the battle game service is referred to as the “server device”, and the network node that receives provision of the battle game service is referred to as the “client device”, regardless of computing power. The online game service is provided by the server device 10 responding to a request from the client device 30.

The host computer constituting the server device 10 need not be only one computer and may be configured using a plurality of computers distributed over the network 20. Furthermore, the general-purpose communication terminal device constituting the server device 10 or the client device 30 also refers to a desktop computer, a notebook computer, a tablet computer, a laptop computer, and a mobile phone. The mobile phone may, for example, be a handheld mobile terminal such as PDC (Personal Digital Cellular), PCS (Personal Communication System), GSM® (Global System for Mobile communications), PHS (Personal Handy phone System), PDA (Personal Digital Assistant), or the like, capable of data communication under a standard such as W-CDMA (Wideband Code Division Multiple Access), CDMA-2000 (Code Division Multiple Access-2000), IMT-2000 (International Mobile Telecommunication-2000), Wibro (Wireless Broadband Internet), or the like. The network 20 is a communication network combining wired networks (such as a LAN (Local Area Network), WAN (Wide Area Network), or VAN (Value Added Network)) and wireless networks (such as a mobile communication network, satellite communication network, Bluetooth, WiFi (Wireless Fidelity), or HSDPA (High Speed Downlink Packet Access)), and the like. Between the server device 10 and the client devices 30 there may be provided a gateway server that converts the communication protocol between these devices.

FIG. 2 is a block diagram illustrating the structure of the server device 10 according to the present embodiment. The server device 10 includes a processor 11, a communication interface 12, and a memory resource 13. The processor 11 is formed by an arithmetic logic unit, which performs arithmetic operations, logic operations, bit operations, and the like; various registers (program counter, data register, instruction register, general-purpose register, and the like); and a timer. The processor 11 decodes and executes a computer program 40 stored in the memory resource 13 and responds to requests from the plurality of client devices 30.

The computer program 40 is a program for executing game processing in response to requests from the plurality of client devices 30 and includes a plurality of software modules that are called and executed within a main program. Such software modules are each modularized subprograms for executing particular processing (processing for game operations, image display, communication, and the like) and are created using, for example, procedures, subroutines, methods, functions, data structures, and the like. A module is a unit that can be compiled independently.

As one such modularized subprogram, the computer program 40 includes a rendition processing module 50 provided with the function of the battle processing unit 60 (described below) that executes rendition processing for a battle between groups. In addition to the battle processing unit 60, in accordance with game specifications, the rendition processing module 50 for example includes functions such as a quest processing unit 51 that implements a quest, which is a search game, a gacha processing unit 52 that executes processing for a gacha (dispensing items that are part of a set), a integrating unit 53 that combines cards, and a secondary battle processing unit 54 that executes processing to battle an enemy character other than in the main battle, such as a raid boss that appears during a quest. The battle processing unit 60 is described in detail below, whereas details on the other processing units 51 to 54 are omitted, since these units are not specific to the exemplary embodiment.

The memory resource (memory unit) 13 stores parameters 70 for each character. Examples of the parameters 70 include a variable related to the attack strength of the character (specifically, a variable that conforms to changes in the character's “attack points” or the like), “skill types” listed on cards (described in detail below) used when attacking a character in the opponent group during a battle between groups, or particular “items” related to skills, and “attributes” of items or cards, yet the parameters 70 are not limited to these examples.

For example, a variable related to “defense points” or the like may be included, as may a variable indicating a “reward” obtained in the battle game. The value concept behind the reward is that a higher value yields a greater advantage against an opponent as the battle game progresses. The reward may, for example, be currency used to purchase an item within the game, an item that increases the character's attack strength, an item that heals the character's stamina or damage, or points that are added by inflicting damage on an enemy character. The reward may also have a value tradable between characters. Furthermore, the parameters 70 may include a variable indicating the length of time since the day the player participated in a battle game.

The memory resource 13 is, for example, a logical device that provides a memory area of a physical device (for example, a computer-readable recording and/or storage medium such as a disk drive, semiconductor memory, or the like). A plurality of physical devices may be mapped onto one logical device, or one physical device may be mapped onto a plurality of logical devices. Data, logs, and the like indicating the access history, play conditions, game progress status, and the like of each client device 30 are stored in the memory resource 13. The communication interface 12 is a hardware module for connecting to the client devices 30 over the network 20, such as an ISDN modem, ADSL modem, cable modem, or the like.

FIG. 3 is a block diagram illustrating the structure of the client device 30 according to the exemplary embodiment. The client device 30 includes a processor 31, an audio output device 32, a communication interface 33, a memory resource 34, an input device 35, and a display device 36. The processor 31 is formed by an arithmetic logic unit, various registers (program counter, data register, instruction register, general-purpose register, and the like), and a timer. The processor 31 decodes and executes a computer program 80 stored in the memory resource 34, transmits a request to the server device 10 in accordance with operation information input into the input device 35, and receives a response from the server device 10. The computer program 80 is an application program for connecting to the server device 10 and receiving provision of the battle game service. This application program can be distributed over the network 20 by the server device 10.

The memory resource 34 is a logical device that provides a memory area of a physical device (for example, a computer-readable recording and/or storage medium such as a disk drive, semiconductor memory, or the like) and also stores operating system programs, driver programs, various data, and the like used for processing by the client device 30.

Examples of driver programs include an input device driver program for controlling the input device 35 and output device driver programs for controlling the audio output device 32 and the display device 36. Examples of the various data include image data for objects, backgrounds, and the like that appear in the game screens.

The audio output device 32 is, for example, a sound player that can reproduce sound data such as game sound effects. The communication interface 33 provides a connection interface with the server device 10 and is configured using a wireless communication interface or a wired communication interface.

The input device 35 provides an interface that receives input operations from the player and is, for example, a touch panel, keyboard, mouse, or the like. The display device 36 provides a player with an image display interface for game screens or the like and is, for example, an organic EL display, liquid crystal display, CRT display, or the like.

When the player logs into the game service of the server device 10 by operating the input device 35 to input authentication information (an ID, password, or the like), a personalized screen associated with the player's authentication information is displayed on the display device 36.

On the personalized screen, a menu screen related to the group to which an individual player belongs is displayed. A “group” can be a virtual collection whose members are characters each controlled by a player via the client device 30. Such groups may be created and established for each game title or may be common to a plurality of game titles. In the field of social games, a group established for such a purpose is also referred to as a “guild”, “party”, “team”, “community”, or the like. A character can refer to a virtual object that obeys a player's instructions and acts in a virtual space on the player's behalf.

A character controlled by a player with experience participating in the game service provided by the server device 10 belongs to a group as a general rule, and the character's history is associated with the authentication information for the player and stored in the memory resource 13 of the server device 10. An editing menu screen related to the group is displayed on the display device 36 based on this history.

On the other hand, the character controlled by a player participating in the game service provided by the server device 10 for the first time does not belong to a particular group as a general rule, and therefore a menu screen belonging to any group (for example, a screen to search for a group or to establish a new group) is displayed on the display device 36. After the group to which the player belongs is determined or selected and the player selects to participate in the game service, a screen for a game event underway at that point in time is displayed on the display device 36.

FIG. 4 illustrates an example of a game screen 200 according to the exemplary embodiment. The game screen 200 includes an event field 201 and a palette 202. The event field 201 is a virtual field on which the battle game progresses between groups 300 and 400. Characters 301, 302, and 303 belonging to one group 300 and characters 401, 402, and 403 belonging to the other group 400 are displayed in the event field 201.

The battle between groups is referred to as a “guild war” or “guild battle”, or as “GvG” in reference to the initial letter of the word “guild”. While communicating with each other, characters belonging to the same group attack opponent characters belonging to the opponent group.

The palette 202 is a virtual location for selecting the “skill” that can be used when each character attacks an opponent character. A deck 600, which is a stack of virtual cards, and a plurality of cards 601, 602, and 603 selected from the deck 600 are displayed on the palette 202. A display (an illustration or letter) indicating the type of skill and a particular item related to the skill are depicted on each card. Attack points (such as points for the skill or the invoked attack), defense points (stamina, life force, or the like), and attribute (fire, water, tree, earth, or the like) are set for each card.

Each player flips over the cards 601, 602, and 603 from the deck 600 and attacks the opponent character in accordance with the combination of the skills, attack points, specific items, defense points, and the like displayed on the cards 601, 602, and 603. The damage inflicted on the opponent character and the damage the player sustains are then calculated.

The gauge 501 indicates the number of times that characters 301, 302, and 303 belonging to the group 300 have consecutively attacked the opponent characters 401, 402, and 403. Similarly, the gauge 502 indicates the number of times that characters 401, 402, and 403 belonging to the group 400 have consecutively attacked the opponent characters 301, 302, and 303. The number of consecutive attacks is referred to as the “number of combos”, and the gauges 501 and 502 displaying the number of combos are referred to as a “combo gauge”.

As illustrated by the functional block in FIG. 5, the battle processing unit 60, which is one functional unit in the rendition processing module 50, includes a battle time managing unit 61, a battle condition extraction unit 62, a target changing unit 63, a battle condition changing unit 64, a battle result tallying unit 65, and a battle rendering unit 66.

The battle time managing unit 61 refers to the timer and the memory resource 13 to manage the time of a battle between groups. In addition to a start time S and an end time E, when the time managed by the battle time managing unit 61 is divided into a plurality of battle times BT (such as a three-way division into a first portion F, a middle portion M, and a last portion L), as illustrated in FIG. 6, the battle time managing unit 61 manages the start time (MS) and the end time (ME/LS) of the subdivided times. In other words, the battle time managing unit 61 has the functions of determining whether each start time and end time has been reached, of determining the end of the battle time, and of inputting the results of these determinations to the other functional units in the battle processing unit 60.

Various patterns depending on the game specifications are possible for the interval between the start time and the end time of the battle time slot, such as 30 minutes, one hour, two hours, and so forth. The battle time slot may also be divided in a variety of patterns, such as dividing in two, into a first half and a last half, or dividing into four or more time slots. An appropriate selection may be made in accordance with game specifications. Such information is stored in the memory resource 13.

The battle condition extraction unit 62 refers to the memory resource 13 to determine whether to change the conditions of the battle (the battle condition) as the battle takes place in a predetermined time slot. In other words, the battle condition extraction unit 62 is a manner of invoking a function to change a battle condition during the time slot group battle.

In this context, the term “battle condition” broadly includes additional conditions added on during a group battle. While also described in detail below, a battle condition can include changing the ability value of an individual character, such as changing the parameters 70 (see FIG. 2) that allow a character to exercise certain abilities during a battle, such as a character's attack strength, defense strength, or the like. Battle conditions also can include any sort of condition applied during a battle, such as providing a reward to the player controlling a character or tallying the battle result during the first portion of a subdivided time slot and reflecting the battle result in a subsequent portion of the subdivided time slot.

The target changing unit 63 refers to the memory resource 13 to set the target of change based on the extracted battle condition. For example, if the battle condition is to increase the level, attack points, or defense points of the lowest ranked n characters in the group, the target changing unit 63 extracts the n characters with the lowest level, the n characters with the lowest attack points, or the n characters with the lowest defense points as the target of change from a data table that lists the characters in the group, setting these characters as the target of change.

When the battle condition is, for example, to increase the attack points by 30% for characters or items such as cards classified under a predetermined attribute, such as fire, water, wind, tree, earth, or the like, the target changing unit 63 sets the characters or items with the attribute as the target of change from among the characters belonging to the group and from among a data table that lists the attributes of cards included in characters' decks, setting these characters or items.

The battle condition changing unit 64 changes the battle condition for the target of change that was selected by the target changing unit 63. Specifically, the battle condition changing unit 64 changes the parameters 70 (see FIG. 2) of the character or item that is the target of change. The parameters referred to here include an index of a character's strength in the battle, such as the attack points or defense points. For example, when the battle condition is to increase attack points of 10,000 points by 30%, the increased attack points become 13,000 points.

When, for example, the battle condition for the target changing unit 63 is to increase the level, attack points, or defense points of the lowest ranked n characters in the group by 30%, the battle condition changing unit 64 executes processing to increase the attack points of each extracted character by 30%. When the target of change is any character or card classified under the fire attribute, the battle condition changing unit 64 for example executes processing to increase the attack points of items with this attribute by 30%.

When the battle condition is to reflect a battle result tallied during the first portion of a subdivided time slot in later portions of the time slot, the battle result tallying unit 65 tallies the battle result during the corresponding portion of the time slot and outputs the result. In other words, as a battle condition for the first portion of a battle, the battle result tallying unit 65 has a function to tally the number of attacks, for example, by a character in the first portion. Based on the tallied result for the first portion, the above-described battle condition changing unit 64 then provides a predetermined reward as the battle condition for the last portion. Other than the above example of the number of attacks by a character, the total attack points or damage inflicted may be the battle result that is tallied. The participation rate or the like of group members may also be the target of tallying.

Based on the changed battle condition, the battle rendering unit 66 executes rendition processing for the game related to the battle. This function is not specific to the exemplary embodiment, and game processing is executed using any desired method. For example, a battle is rendered in accordance with the screen example illustrated in FIG. 4.

Next, examples of battle conditions and targets of change are described in detail with reference to FIGS. 7(a) and 7(b). Two types of examples are described below. In the first example, the battle condition is changed randomly or by a predetermined setting in each of the subdivided time slots (see FIG. 7(a)). In the second example, among the subdivided time slots, battle participation and battle results are tallied during an earlier time slot, and the tallied results are reflected in the battle conditions of time slots after the earlier time slot (see FIG. 7(b)).

Example of changing the battle condition as time progresses

(1) Increasing attack strength of lowest ranked n characters in group: for example, among the characters that are members of the group, several of the characters with the lowest abilities available or necessary in the battle, such as level, attack points, or defense points, or the lowest 30% of the group members in terms of attack points are increased by 30%. (2) Increasing item attribute attack points: for example, the attack points of characters or items such as cards classified under the attributes of fire, water, wind, tree, earth, or the like is increased by 10%. (3) Increasing the attack points in accordance with player attribute: for example, depending on whether the gender of the registered player is male or female, the attack points are increased by 20%. (4) Increasing the combo effect: the combo effect is changed by time slot. For example, in a time slot with a poor participation rate, such as the first portion of a group battle time, the regular increase in attack points of 10% each for consecutive attacks is boosted to 15% each.

The above changes in battle conditions are modified freely by time slot. FIG. 7(a) is a conceptual diagram for this example. As illustrated in FIG. 7(a), for example in the first portion of the battle, the battle condition is to “increase the attack points of the five members with the lowest battle ability by 30%”. The battle condition for the middle portion of the battle is to “increase the attack points of cards classified under the water attribute by 30%”. Furthermore, the battle condition for the last portion of the battle is to “increase the attack points of female players by 30%”. The above-described percentage of the increase in attack points is merely an example and may be defined in accordance with game specifications. Furthermore, the target of change is not limited to the attack points in the above example and broadly includes the parameters 70 set for characters and items, including defense points, level, and the like.

In this way, circumstances that allow beginners to enjoy the battle can be created by favoring beginners in the first portion in which the participation rate in the battle is not very high. Furthermore, by changing the parameters that increase the attack points in the middle portion and the last portion, characters that satisfy these parameters are encouraged to participate. Hence, an increase in the participation rate in the battle can be expected.

The following is an example of changing battle conditions in accordance with battle participation and battle results:

Another example of changing battle conditions is to tally the battle participation by the group or to tally the results of the battle in an earlier time slot among the subdivided battle time slots. Furthermore, in the battle during a time slot after the earlier time slot, a predetermined battle condition may be set based on the tallied result. Examples are as follows.

(1) Providing an incentive based on an intermediate tally: for example, as a battle condition for the first half of the battle, the number of attacks by characters in the first half is tallied, and as a battle condition for the last half of the battle, a predetermined reward is provided based on the result for the first half. When the reward is a card usable in the last half of the battle, the reward may be made useful by, for example, providing an event bonus for the card and doubling the attack strength during the last half of the battle.

(2) Change in battle condition based on an intermediate tally: for example, each group's participation rate or number of participants in the first half of the battle is extracted. The attack strength during the last half is increased uniformly by 10% for a group that, in the first half, has a participation rate of at least a predetermined rate or a large number of participants.

In the conceptual diagram for this example in FIG. 7(b), the battle results in the earlier time slot (first half F) are tallied, and the results are reflected in the subsequent time slot (last half L). In this way, in order to have an advantage in the last half L, which determines victory, it becomes necessary to participate and to battle actively in the first half F. Therefore, an increase in the participation rate across the entire time slot from the first half through the last half can be expected.

FIG. 8 is a flowchart illustrating rendition processing by the battle processing unit 60 according to the present embodiment. The rendition processing module 50 is a subprogram written with a command set for causing the server device 10 to execute the function of the battle processing unit 60 via the processing from step 101 to step 110.

In the battle processing unit 60, the battle time managing unit 61 refers to the timer and the memory resource 13 and determines whether the time to hold a battle between groups, i.e. the start time of the battle, has been reached (step S101). In other words, the battle time managing unit 61 determines whether the start time S illustrated in FIG. 6 has been reached.

When determining that the start time of the battle has not been reached (step S101: NO), the battle time managing unit 61 repeats the processing in step S101. Conversely, when the battle time managing unit 61 determines that the start time of the battle has been reached (step S101: YES), the battle condition extraction unit 62 refers to the memory resource 13 to check whether a flag indicating a change in the battle condition during the battle is set (step S102).

When determining that a flag indicating a change in the battle condition during the battle is set (step S102: YES), the battle condition extraction unit 62 reads the battle condition to change from the memory resource 13 (step S103). Conversely, when determining that a flag indicating a change in the battle condition is not set (step S102: NO), the battle condition extraction unit 62 determines not to change the battle condition during the battle time slot, and processing proceeds to step S109.

Based on the battle condition read in step S103, the target changing unit 63 refers to the memory resource 13 to determine whether there is a character, or an item such as a card held by a character, that is the target of change in the battling groups (step S104). When determining that there is a target of change (step S104: YES), the target changing unit 63 extracts and sets the target of change (step S105).

The battle condition changing unit 64 changes the battle condition for the character or item set as the target of change (step S106), and processing proceeds to step S109.

On the other hand, when the target changing unit 63 determines that there is no character or item that is the target of change (step S104: NO), processing proceeds to step S107.

In step S107, it is determined whether the battle condition is not a target of change, i.e. whether the battle condition is not a character, or an item such as a card held by a character, that is the target of change in the battling groups, but rather to “tally battle results”. When it is determined that the target condition is to tally battle results (step S107: YES), the battle result tallying unit 65 tallies the number of attacks by a character, the total attack points or damage inflicted, the participation rate of group members, or the like during the battle (step S108). When the target condition is determined not to be the tallying of battle results (step S107: NO), processing proceeds to step S109.

In step S109, the battle rendering unit 66 executes rendition processing based on the changed battle condition.

Next, in step S110, the battle time managing unit 61 determines whether there is a next subdivided time slot. As illustrated in FIG. 6, this is the case of determining whether there is a start time (MS) of a time slot yielded by dividing the battle time BT into a plurality of time slots.

In step S110, when determining that the next subdivided time slot (for example, MS in FIG. 6) exists (step S110: YES), the battle time managing unit 61 determines whether that subdivided time slot has been reached (step S111). When determining that the subdivided time slot has not been reached (step S111: NO), the battle time managing unit 61 repeats the processing in step S111. Conversely, when the battle time managing unit 61 determines that the subdivided time slot has been reached (step S111: YES), processing returns to step S102, and processing from step S102 to step S109 is repeated. As a result, processing to change the target condition for the next subdivided time slot (for example, the time slot “ME/LS” in FIG. 6) is executed.

On the other hand, when determining that there is no next subdivided time slot (step S110: NO), the battle time managing unit 61 then determines whether the end time has been reached (step S112). In other words, when determining that the end time of the battle (time “E” in FIG. 6) has not been reached (step S112: NO), the battle time managing unit 61 repeats the processing in step S112. Conversely, when the battle time managing unit 61 determines that the end time of the battle has been reached (step S112: YES), processing to end the battle is executed (step S113), thus ending the process (END).

According to the above embodiment, a battle game played in a predetermined time is divided into a plurality of time slots, such as a first portion, middle portion, and last portion, and a battle condition is changed in at least one of the subdivided time slots. By thus dividing the time slot of the battle game into a plurality of time slots and setting the battle condition for each time slot, a battle game that has conventionally been played under certain rules can be changed during a predetermined time when the battle game is played. In particular, in the first half of the battle, a battle condition that is advantageous for a certain target is set, for example by increasing the attack strength of low-level characters. The battle condition in the time slot for the first half, for example, in which the participation rate in the time slot battle game is not high, is also changed. By thus changing the battle condition by time slot, an increase in the participation rate of characters throughout the time slots can be expected.

In particular, setting the target of change for the battle condition to be an ability value that group members can exercise in the battle, such as attack strength or defense strength, allows for the changing of a rapid response parameter that yields an advantage in the battle. Players are thus stimulated to participate in the battle.

As described above, circumstances that allow beginners to enjoy the battle can be created by setting the battle conditions to increase the attack strength of low-level characters, which correspond to beginners, and to favor beginners to the game in the first portion of the battle in which the participation rate in the battle is not very high. Furthermore, by making changes to increase the attack points in the middle portion and the last portion, characters that satisfy these parameters are encouraged to participate, thereby leading to an increase in the participation rate in the battle and eliminating a sense of unfairness. A game that, without regard for level, is enjoyable and accessible can be provided for players with a wide range of levels.

As another battle condition, battle results in an earlier time slot (for example, the first half) are tallied, and the results are reflected in the battle conditions of time slots after the earlier time slot (for example, the last half). In this way, in order to have an advantage in the last half, which determines victory, it becomes necessary to participate in the first half and to be active in the battle by, for example, actively attacking the enemy in the first half as well while using up battle points. Therefore, an increase in the participation rate across a long time period from the first half to the last half can be expected.

The processing of the above-described embodiment is implemented by coordination between the rendition processing module 50 and the processor 11, yet similar rendition processing may be executed by a dedicated hardware resource (such as an application-specific integrated circuit (ASIC)) or by firmware.

The computer program 40 may, for example, be written in an object-oriented language. In an object-oriented language, battle game processing is made possible by treating each character 301 to 303 as an object, defining the parameters 70 as “attributes” of the characters 301 to 303, and defining the behaviors of the characters 301 to 303 (such as attacking) as “methods” of the characters 301 to 303. Image display can be controlled by treating not only the characters 301 to 303 but also the gauges 501 and 502, the cards 601, 602, and 603, and the like displayed on the game screen 200 as objects and defining their “attributes” and “methods”.

The computer program 40 is not, however, limited to an object oriented language and may be written in a procedural language, for example. The computer program 40 can be encoded into a predetermined signal format and transmitted between nodes over a transmission medium (wired communication network) or a transmitted wave (radio waves).

The above-described exemplary embodiment is only an example for describing aspects of the present disclosure, and the present disclosure should not be interpreted as limited to the above exemplary embodiment. Furthermore, various modifications may be made without departing from the scope of the present disclosure. For example, a person of ordinary skill in the art could replace the resources described in the embodiment (hardware resources and software resources) with equivalents, and such replacements are also included in the scope of the present disclosure.

The battle game described in this specification can also be controlled by a server system including more than one server device 10. 

1. A method for controlling a battle game, comprising: displaying a game screen comprising a first field at a lower position in the game screen and a second field above the first field, wherein in the first field, a plurality of cards selected from a deck which is a stack of virtual cards are arranged in a horizontal direction; during a first term of the battle game, in the second field, under a first battle condition, conducting a battle against an opponent character appearing in the first term using a parameter based on a card selected by a player; and during a second term after the first term, in the second field, under a second battle condition which is different from the first condition, conducting a battle against an opponent character appearing in the second term using a parameter based on a card selected by the player.
 2. The method of claim 1, wherein the second battle condition is predetermined regardless of a battle result in the first term.
 3. The method of claim 1, wherein, during a third term after the second term, in the second field, under a third battle condition which is different from the first condition and second condition and is dependent on a battle result in the second term, conducting a battle against an opponent character appearing in the third term using a parameter based on a card selected by the player.
 4. The method of claim 3, wherein the third battle condition is a condition for giving a reward to the player.
 5. The method of claim 1, wherein an attack strength against at least one opponent character under the second battle condition is higher than an attack strength against at least one opponent character under the first battle condition.
 6. The method of claim 1, wherein the parameter comprises an attack strength and a life force.
 7. The method of claim 1, wherein the second battle condition is dependent on a battle result of the first term.
 8. The method of claim 7, wherein the second battle condition is dependent on an attack status in the first term.
 9. The method of claim 1, wherein the second battle condition is a condition for giving a reward to the player.
 10. The method of claim 1, wherein a start timing and an end timing of each of the first term and the second term are determined based on a start timing of the battle game.
 11. The method of claim 1, further comprising: receiving a player card selection step; maintaining an interface gauge element during the battle game; and dynamically adjusting the interface gauge element; wherein a dynamic adjustment of the interface gauge element takes place after the player card selection step.
 12. The method of claim 1, wherein at least one of the set of: conducting the battle against the opponent character appearing in the first term and conducting the battle against the opponent character appearing in the second term comprises: receiving, from the player, a selection of the card; displaying a player group on the second field, the player group comprising a formation including a plurality of player characters; and modifying the player group based on the card selected by the player; wherein the battle is conducted between a player character in the player group and the at least one of the set of: the opponent character appearing in the first term and the opponent character appearing in the second term.
 13. A game apparatus configured to provide a battle game between a plurality of players, comprising a communication interface configured to communicate with a plurality of client devices, and a rendition processing module comprising a battle processing unit; wherein the rendition processing module is configured to render a game screen comprising a first field at a lower position in the game screen and a second field above the first field, wherein in the first field, a plurality of cards selected from a deck which is a stack of virtual cards are arranged in a horizontal direction; wherein the battle processing unit is configured to, during a first term of the battle game, in the second field, under a first battle condition, conduct a battle against an opponent character appearing in the first term using a parameter based on a card selected by a player in the plurality of players; wherein the battle processing unit is configured to, during a second term after the first term, in the second field, under a second battle condition which is different from the first condition, conduct a battle against an opponent character appearing in the second term using a parameter based on a card selected by the player.
 14. The game apparatus of claim 13, wherein the second battle condition is predetermined regardless of a battle result in the first term.
 15. The game apparatus of claim 13, wherein the battle processing unit is configured to, during a third term after the second term, in the second field, under a second battle condition which is different from the first condition and second condition and is dependent on a battle result in the second term, conduct a battle against an opponent character appearing in the third term using a parameter based on a card selected by the player.
 16. The game apparatus of claim 13, wherein the second battle condition is dependent on a battle result of the first term.
 17. The game apparatus of claim 13, wherein a start timing and an end timing of each of the first term and the second term are determined based on a start timing of the battle game.
 18. The game apparatus of claim 13, wherein the second battle condition is dependent on an attack status in the first term.
 19. The game apparatus of claim 13, wherein an attack strength against at least one opponent character under the second battle condition is higher than an attack strength against at least one opponent character under the first battle condition.
 20. The game apparatus of claim 13, wherein the parameter comprises an attack strength and a life force.
 21. The game apparatus of claim 13, wherein the rendition processing unit is configured to, during at least one of the set of: conducting the battle against the opponent character appearing in the first term, conducting the battle against the opponent character appearing in the second term, and conducting the battle against the opponent character appearing in the third term, perform the steps of: receiving a player card selection; displaying, on the game screen, a player group on the second field, the player group comprising a formation including a plurality of player characters; and modifying the player group based on the card selected by the player; wherein the battle processing unit is configured to conduct the battle between a player character in the player group and the at least one of the set of: the opponent character appearing in the first term, the opponent character appearing in the second term, and the opponent character appearing in the third term; and wherein the rendition processing unit is further configured to maintain, on the game screen, an interface gauge element during the battle game, and dynamically adjust the interface gauge element, wherein a dynamic adjustment of the interface gauge element takes place after the player card selection is received.
 22. A computer program product embodied on a non-transitory computer-readable medium and containing instructions that, when executed, causes a game apparatus provided with a memory unit to provide a game for executing a battle game between a plurality of players, the game apparatus thereby being configured to perform the steps of: displaying a game screen comprising a first field at a lower position in the game screen and a second field above the first field, wherein in the first field, a plurality of cards selected from a deck which is a stack of virtual cards are arranged in a horizontal direction; during a first term of the battle game, in the second field, under a first battle condition, conducting a battle against an opponent character appearing in the first term using a parameter based on a card selected by a player in the plurality of players; during a second term after the first term, in the second field, under a second battle condition which is different from the first condition, conducting a battle against an opponent character appearing in the second term using a parameter based on a card selected by the player.
 23. The computer program product of claim 22, wherein the second battle condition is predetermined regardless of a battle result in the first term.
 24. The computer program product of claim 22, wherein the non-transitory computer-readable medium further comprises instructions to configure the game apparatus to perform the steps of: during a third term after the second term, in the second field, under a second battle condition which is different from the first condition and second condition and is dependent on a battle result in the second term, conducting a battle against an opponent character appearing in the third term using a parameter based on a card selected by the player.
 25. The computer program product of claim 22, wherein the second battle condition is dependent on a battle result of the first term.
 26. The computer program product of claim 22, wherein a start timing and an end timing of each of the first term and the second term are determined based on a start timing of the battle game.
 27. The computer program product of claim 22, wherein the second battle condition is dependent on an attack status in the first term.
 28. The computer program product of claim 22, wherein an attack strength against at least one opponent character under the second battle condition is higher than an attack strength against at least one opponent character under the first battle condition.
 29. The computer program product of claim 22, wherein the non-transitory computer-readable medium further comprises instructions to configure the game apparatus to, during at least one of the set of: conducting the battle against the opponent character appearing in the first term and conducting the battle against the opponent character appearing in the second term, perform the steps of: receiving a player card selection; displaying, on the game screen, a player group on the second field, the player group comprising a formation including a plurality of player characters; and modifying the player group based on the card selected by the player; wherein the battle is conducted between a player character in the player group and the at least one of the set of: the opponent character appearing in the first term and the opponent character appearing in the second term; and wherein the game apparatus is further configured to maintain, on the game screen, an interface gauge element during the battle game, and dynamically adjust the interface gauge element, wherein a dynamic adjustment of the interface gauge element takes place after the player card selection is received.
 30. A computer program product embodied on a non-transitory computer-readable medium and containing instructions that, when executed, causes a game apparatus provided with a memory unit to provide a game for executing a battle game between a plurality of players, the game apparatus thereby being configured to perform the steps of: displaying a game screen comprising a first field at a lower position in the game screen and a second field above the first field, wherein in the first field, a plurality of cards selected from a deck which is a stack of virtual cards are arranged in a horizontal direction; during a first term of the battle game, in the second field, under a first battle condition, conducting a battle against an opponent character appearing in the first term using a parameter based on a card selected by a player in the plurality of players; during a second term after the first term, in the second field, under a second battle condition which is different from the first condition and is predetermined regardless of a battle result in the first term, conducting a battle against an opponent character appearing in the second term using a parameter based on a card selected by the player; during a third term after the second term, in the second field, under a third battle condition which is different from the first condition and second condition and is dependent on a battle result in the second term, conducting a battle against an opponent character appearing in the third term using a parameter based on a card selected by the player. 